REMnux is a lightweight Linux distribution for assisting malware analysts in reverse-engineering malicious software. The distribution is based on Ubuntu

REMnux isn't a fancy distribution that was built from scratch... In simple terms, it's a virtual machine that runs Ubuntu and has various useful malware tools set up on it.

REMnux is also useful for analyzing web-based malware, such as malicious JavaScript, Java programs, and Flash files. It also has tools for analyzing malicious documents, such as Microsoft Office and Adobe PDF files, and utilities for reversing malware through memory forensics. In these cases, malware may be loaded onto REMnux and analyzed directly on the REMnux system without requiring other systems to be present in the lab.